DENVER — Cabela's, a national sporting goods and outdoor store, has purchased a 10.68-acre retail site in Denver for $3.7 million. It is located on the Southwest corner of Interstate 25 and Ridgegate Parkway. A 105,000-square-foot Cabela's is set to be constructed on the site. It is scheduled to open in spring 2013. The site is part of a 30-acre retail master-planned development.